NTI Matrix Installation And Operation Instructions Manual page 44

Installation and Operation Instructions
Operation and Set-up
The Matrix employs a pneumatic modulation system. This modulation system increases or decreases the velocity
of the combustion blower, to meet the demand for heating. The gas valve senses this change in blower pressure
and introduces the required amount of gas to ensure correct combustion. The (Red) Boiler Controller reads the
boiler water temperature, compares it to the set point, and adjusts the burner firing rate accordingly by varying the
speed of the combustion blower.
The (Blue) Fan Controller communicates the appropriate demand and temperature set point to the (Red) Boiler
Controller via a series of digital and analog inputs. Tables 13-3(a) and 13-3(b) show the Boiler Controller's
response to each demand. For more information on 'RESET MODE' see section "Outdoor Sensor (10K)".
Table 13-3(a) Operation – Conventional Mode
Standby/Storage
Mode
Storage Storage
Condition
Off
Set Point -
Burner On -
Burner Off -
Off
Heat Circ.
Table 13-3(b) Operation – Reset Mode
Standby/Storage
Mode
Storage Storage
Condition
Off
Set Point -
Burner On -
Burner Off -
Off
Heat Circ.
Note 1: SP (Setpoint) received from Matrix Fan Controller.
44
Primary Auxiliary
Forced Air Forced Air
Call (W1) Call (W2)
Aux Heat
Heat (W1)
On
Note 1
160°F SP
Note 1
140°F SP
180°F 210°F
On On
Primary Auxiliary
Forced Air Forced Air
Call (W1) Call (W2)
Aux Heat
Heat (W1)
On
Note 1
160°F SP
Note 1
140°F SP
180°F 210°F
On On
Shared Call
Forced
Air/Hydronic
Shared (W1/W2
(W2) and H)
Greater of SP/ HI
HI
and HYD
Greater of SP/HI
HI
and HYD
210°F 210°F
On On
Shared Call
Forced
Air/Hydronic
Shared (W1/W2
(W2) and H)
Greater of SP/ HI
HI
Calc.
and HYD
Calc. Calc.
Greater of SP/ HI
HI
Calc.
and HYD
Calc. Calc.
210°F 210°F
On On
Matrix
Hydronic DHW
Demand (H) Demand
Domestic
Hydronic Call
Only
H2O to
HYD
H2O+30
HYD-DIF H2O+30
HYD + 10 210F
On On
Hydronic DHW
Demand (H) Demand
Domestic
Hydronic Call
Only
H2O to
HYD
Calc.
H2O+30
HYD -DIF H2O+30
Calc.
HYD + 10 210F
Calc.
On On